Search.searchjsmmbn.com is a browser hijacker. It attacks Chrome, Firefox, Edge, Internet Explorer browsers. It hijacks their homepage, new tab, and default search engine. When you search something on the search box it records your search query and then redirects you to Yahoo search engine for results. It also tracks your other browsing activity.
You can remove Search.searchjsmmbn.com by using either the manual or the automatic method. The manual process takes a lot of time and requires a lot of tech knowledge. However, the automatic method is hassle-free. You can download MalwareFox Anti-Malware which is able to remove every kind of malware from your computer, including browser hijackers.